Humane PC and its Humane Reader child are open source hardware projects with some seriously low-cost internal components. At volume the PC could retail for as low as $20, and that's with 2GB of microSD storage, USB / PS/2 plugs, and video out. The PC is primarily designed to output low-res, black and white text to a TV, making it a low cost reader for developing countries, and the Humane Reader project pre-loads the device with thousands of Wikipedia articles (much in the vein of the OpenMoko WikiReader).